My Mother is trying to remember a book she read in what she believes to be the late 90's and early 2000s. She claims it featured a story about astronauts who travelled out to space to find a new planet to populate, due to overpopulation of the earth. Earth's overpopulation had caused the leaders to put birth control of some sort into the water in order to prevent any more babies from being born, but considering people couldn't have babies, by the time the astronauts returned (preserved in hypersleep or something of that sort,) the population had died out due to not being able to reproduce. My Mom's birthday is coming up and if I could get her a copy of this book (she wants to re-read it,) I'd be thrilled! I just need to figure out what the name of it is. If you can help please do!

Thank You! Taylor